Harden desktop perf CI with deps, artifacts, and timeout hints

- Install required Linux desktop runtime packages before perf trace runs
- Increase perf trace timeout in CI and always upload `/tmp/t3code-perf-artifacts`
- Add timeout failure hints and recent log-tail output to `desktop-perf-trace` errors
758b3e1094Julius Marminge committed on 2/18/2026, 3:49:54 AMparentae08eb8
2 files changedLine totals unavailable